Selection Elements and Material Type of Float of Magnetic Flap Level Gauge

The magnetic flap level gauge is a liquid level measuring instrument that works on the principle of magnetic coupling and buoyancy. It can be said that the magnetic flap level gauge can work stably. The key component is the magnetic float in the measuring tube cavity. As the name implies, the magnetic float is a metal float (float) that has certain magnetism and can always be floating in an appropriate measuring liquid medium. It is the core component of the normal operation of the magnetic flap level gauge. Where is the float of the magnetic flap level gauge installed and how does it work? The working principle of the magnetic flap level gauge in the following figure may be intuitively understood.

1. According to the principle and the figure above, we know that the magnetic float is called because it is magnetic, and because of the buoyancy, which affects the rise of the float when the liquid level rises. It is indicated by the magnetic action scale. Then the buoyancy of the level gauge float is related to the density of the liquid.

2. The float of level gauge has many materials, such as PP, UPVC, 304 stainless steel, 316L stainless steel, 1Cr18Ni9Ti, 304 PTFE lining, titanium alloy, etc.

3. We know that the magnetic flap level gauge can measure the liquid level under high temperature and high pressure. In addition to the requirements for the main steel pipe, panel and flange, there is another requirement that the float should also be resistant to high temperature and high pressure, that is, the thickness and materials of the float of the level gauge are different.

According to the above three points, the float of the level gauge needs to be provided when ordering separately: medium density, corrosivity, medium temperature and pressure.

Like the liquid level gauge, the magnetic float also needs to contact with liquid. Because there are many kinds of liquid mediums to be measured on the industrial production site, to make the magnetic float work normally, we need to use different materials according to different medium liquids.

For example, the materials include stainless steel 304, 316L, PP, titanium alloy, tetrafluoroethylene (PTFE), plastic float, etc.

Magnetic float level gauge, titanium alloy and tetrafluoro are shown in the figure. Stainless steel 304 is a relatively common stainless steel, and magnetic flap level gauge is also very common. 316L stainless steel has better corrosion resistance, while PP and tetrafluoro are generally used for medium and strong anti-corrosion media. To be specific, the user can communicate with the instrument manufacturer to select the most appropriate material type.